1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)stdio.h 8.5 (Berkeley) 4/29/95 37 * $FreeBSD$ 38 */ 39 40 #ifndef _STDIO_H_ 41 #define _STDIO_H_ 42 43 #include <sys/cdefs.h> 44 #include <sys/_null.h> 45 #include <sys/_types.h> 46 47 typedef __off_t fpos_t; 48 49 #ifndef _SIZE_T_DECLARED 50 typedef __size_t size_t; 51 #define _SIZE_T_DECLARED 52 #endif 53 54 #if __BSD_VISIBLE || __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 55 #ifndef _VA_LIST_DECLARED 56 typedef __va_list va_list; 57 #define _VA_LIST_DECLARED 58 #endif 59 #endif 60 61 #define _FSTDIO /* Define for new stdio with functions. */ 62 63 /* 64 * NB: to fit things in six character monocase externals, the stdio 65 * code uses the prefix `__s' for stdio objects, typically followed 66 * by a three-character attempt at a mnemonic. 67 */ 68 69 /* stdio buffers */ 70 struct __sbuf { 71 unsigned char *_base; 72 int _size; 73 }; 74 75 /* 76 * stdio state variables. 77 * 78 * The following always hold: 79 * 80 * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), 81 * _lbfsize is -_bf._size, else _lbfsize is 0 82 * if _flags&__SRD, _w is 0 83 * if _flags&__SWR, _r is 0 84 * 85 * This ensures that the getc and putc macros (or inline functions) never 86 * try to write or read from a file that is in `read' or `write' mode. 87 * (Moreover, they can, and do, automatically switch from read mode to 88 * write mode, and back, on "r+" and "w+" files.) 89 * 90 * _lbfsize is used only to make the inline line-buffered output stream 91 * code as compact as possible. 92 * 93 * _ub, _up, and _ur are used when ungetc() pushes back more characters 94 * than fit in the current _bf, or when ungetc() pushes back a character 95 * that does not match the previous one in _bf. When this happens, 96 * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff 97 * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. 98 * 99 * Certain members of __sFILE are accessed directly via macros or 100 * inline functions. To preserve ABI compat, these members must not 101 * be disturbed. These members are marked below with (*). 102 */ 103 typedef struct __sFILE { 104 unsigned char *_p; /* (*) current position in (some) buffer */ 105 int _r; /* (*) read space left for getc() */ 106 int _w; /* (*) write space left for putc() */ 107 short _flags; /* (*) flags, below; this FILE is free if 0 */ 108 short _file; /* (*) fileno, if Unix descriptor, else -1 */ 109 struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ 110 int _lbfsize; /* (*) 0 or -_bf._size, for inline putc */ 111 112 /* operations */ 113 void *_cookie; /* cookie passed to io functions */ 114 int (*_close)(void *); 115 int (*_read)(void *, char *, int); 116 fpos_t (*_seek)(void *, fpos_t, int); 117 int (*_write)(void *, const char *, int); 118 119 /* separate buffer for long sequences of ungetc() */ 120 struct __sbuf _ub; /* ungetc buffer */ 121 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 122 int _ur; /* saved _r when _r is counting ungetc data */ 123 124 /* tricks to meet minimum requirements even when malloc() fails */ 125 unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ 126 unsigned char _nbuf[1]; /* guarantee a getc() buffer */ 127 128 /* separate buffer for fgetln() when line crosses buffer boundary */ 129 struct __sbuf _lb; /* buffer for fgetln() */ 130 131 /* Unix stdio files get aligned to block boundaries on fseek() */ 132 int _blksize; /* stat.st_blksize (may be != _bf._size) */ 133 fpos_t _offset; /* current lseek offset */ 134 135 struct pthread_mutex *_fl_mutex; /* used for MT-safety */ 136 struct pthread *_fl_owner; /* current owner */ 137 int _fl_count; /* recursive lock count */ 138 int _orientation; /* orientation for fwide() */ 139 __mbstate_t _mbstate; /* multibyte conversion state */ 140 } FILE; 141 142 #ifndef _STDSTREAM_DECLARED 143 __BEGIN_DECLS 144 extern FILE *__stdinp; 145 extern FILE *__stdoutp; 146 extern FILE *__stderrp; 147 __END_DECLS 148 #define _STDSTREAM_DECLARED 149 #endif 150 151 #define __SLBF 0x0001 /* line buffered */ 152 #define __SNBF 0x0002 /* unbuffered */ 153 #define __SRD 0x0004 /* OK to read */ 154 #define __SWR 0x0008 /* OK to write */ 155 /* RD and WR are never simultaneously asserted */ 156 #define __SRW 0x0010 /* open for reading & writing */ 157 #define __SEOF 0x0020 /* found EOF */ 158 #define __SERR 0x0040 /* found error */ 159 #define __SMBF 0x0080 /* _buf is from malloc */ 160 #define __SAPP 0x0100 /* fdopen()ed in append mode */ 161 #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ 162 #define __SOPT 0x0400 /* do fseek() optimization */ 163 #define __SNPT 0x0800 /* do not do fseek() optimization */ 164 #define __SOFF 0x1000 /* set iff _offset is in fact correct */ 165 #define __SMOD 0x2000 /* true => fgetln modified _p text */ 166 #define __SALC 0x4000 /* allocate string space dynamically */ 167 #define __SIGN 0x8000 /* ignore this file in _fwalk */ 168 169 /* 170 * The following three definitions are for ANSI C, which took them 171 * from System V, which brilliantly took internal interface macros and 172 * made them official arguments to setvbuf(), without renaming them. 173 * Hence, these ugly _IOxxx names are *supposed* to appear in user code. 174 * 175 * Although numbered as their counterparts above, the implementation 176 * does not rely on this. 177 */ 178 #define _IOFBF 0 /* setvbuf should set fully buffered */ 179 #define _IOLBF 1 /* setvbuf should set line buffered */ 180 #define _IONBF 2 /* setvbuf should set unbuffered */ 181 182 #define BUFSIZ 1024 /* size of buffer used by setbuf */ 183 #define EOF (-1) 184 185 /* 186 * FOPEN_MAX is a minimum maximum, and is the number of streams that 187 * stdio can provide without attempting to allocate further resources 188 * (which could fail). Do not use this for anything. 189 */ 190 /* must be == _POSIX_STREAM_MAX <limits.h> */ 191 #ifndef FOPEN_MAX 192 #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ 193 #endif 194 #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ 195 196 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ 197 #if __XSI_VISIBLE 198 #define P_tmpdir "/var/tmp/" 199 #endif 200 #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ 201 #define TMP_MAX 308915776 202 203 #ifndef SEEK_SET 204 #define SEEK_SET 0 /* set file offset to offset */ 205 #endif 206 #ifndef SEEK_CUR 207 #define SEEK_CUR 1 /* set file offset to current plus offset */ 208 #endif 209 #ifndef SEEK_END 210 #define SEEK_END 2 /* set file offset to EOF plus offset */ 211 #endif 212 213 #define stdin __stdinp 214 #define stdout __stdoutp 215 #define stderr __stderrp 216 217 __BEGIN_DECLS 218 /* 219 * Functions defined in ANSI C standard. 220 */ 221 void clearerr(FILE *); 222 int fclose(FILE *); 223 int feof(FILE *); 224 int ferror(FILE *); 225 int fflush(FILE *); 226 int fgetc(FILE *); 227 int fgetpos(FILE * __restrict, fpos_t * __restrict); 228 char *fgets(char * __restrict, int, FILE * __restrict); 229 FILE *fopen(const char * __restrict, const char * __restrict); 230 int fprintf(FILE * __restrict, const char * __restrict, ...); 231 int fputc(int, FILE *); 232 int fputs(const char * __restrict, FILE * __restrict); 233 size_t fread(void * __restrict, size_t, size_t, FILE * __restrict); 234 FILE *freopen(const char * __restrict, const char * __restrict, FILE * __restrict); 235 int fscanf(FILE * __restrict, const char * __restrict, ...); 236 int fseek(FILE *, long, int); 237 int fsetpos(FILE *, const fpos_t *); 238 long ftell(FILE *); 239 size_t fwrite(const void * __restrict, size_t, size_t, FILE * __restrict); 240 int getc(FILE *); 241 int getchar(void); 242 char *gets(char *); 243 void perror(const char *); 244 int printf(const char * __restrict, ...); 245 int putc(int, FILE *); 246 int putchar(int); 247 int puts(const char *); 248 int remove(const char *); 249 int rename(const char *, const char *); 250 void rewind(FILE *); 251 int scanf(const char * __restrict, ...); 252 void setbuf(FILE * __restrict, char * __restrict); 253 int setvbuf(FILE * __restrict, char * __restrict, int, size_t); 254 int sprintf(char * __restrict, const char * __restrict, ...); 255 int sscanf(const char * __restrict, const char * __restrict, ...); 256 FILE *tmpfile(void); 257 char *tmpnam(char *); 258 int ungetc(int, FILE *); 259 int vfprintf(FILE * __restrict, const char * __restrict, 260 __va_list); 261 int vprintf(const char * __restrict, __va_list); 262 int vsprintf(char * __restrict, const char * __restrict, 263 __va_list); 264 265 #if __ISO_C_VISIBLE >= 1999 266 int snprintf(char * __restrict, size_t, const char * __restrict, 267 ...) __printflike(3, 4); 268 int vfscanf(FILE * __restrict, const char * __restrict, __va_list) 269 __scanflike(2, 0); 270 int vscanf(const char * __restrict, __va_list) __scanflike(1, 0); 271 int vsnprintf(char * __restrict, size_t, const char * __restrict, 272 __va_list) __printflike(3, 0); 273 int vsscanf(const char * __restrict, const char * __restrict, __va_list) 274 __scanflike(2, 0); 275 #endif 276 277 /* 278 * Functions defined in all versions of POSIX 1003.1. 279 */ 280 #if __BSD_VISIBLE || __POSIX_VISIBLE <= 199506 281 /* size for cuserid(3); UT_NAMESIZE + 1, see <utmp.h> */ 282 #define L_cuserid 17 /* legacy */ 283 #endif 284 285 #if __POSIX_VISIBLE 286 #define L_ctermid 1024 /* size for ctermid(3); PATH_MAX */ 287 288 char *ctermid(char *); 289 FILE *fdopen(int, const char *); 290 int fileno(FILE *); 291 #endif /* __POSIX_VISIBLE */ 292 293 #if __POSIX_VISIBLE >= 199209 294 int pclose(FILE *); 295 FILE *popen(const char *, const char *); 296 #endif 297 298 #if __POSIX_VISIBLE >= 199506 299 int ftrylockfile(FILE *); 300 void flockfile(FILE *); 301 void funlockfile(FILE *); 302 303 /* 304 * These are normally used through macros as defined below, but POSIX 305 * requires functions as well. 306 */ 307 int getc_unlocked(FILE *); 308 int getchar_unlocked(void); 309 int putc_unlocked(int, FILE *); 310 int putchar_unlocked(int); 311 #endif 312 #if __BSD_VISIBLE 313 void clearerr_unlocked(FILE *); 314 int feof_unlocked(FILE *); 315 int ferror_unlocked(FILE *); 316 int fileno_unlocked(FILE *); 317 #endif 318 319 #if __POSIX_VISIBLE >= 200112 320 int fseeko(FILE *, __off_t, int); 321 __off_t ftello(FILE *); 322 #endif 323 324 #if __BSD_VISIBLE || __XSI_VISIBLE > 0 && __XSI_VISIBLE < 600 325 int getw(FILE *); 326 int putw(int, FILE *); 327 #endif /* BSD or X/Open before issue 6 */ 328 329 #if __XSI_VISIBLE 330 char *tempnam(const char *, const char *); 331 #endif 332 333 /* 334 * Routines that are purely local. 335 */ 336 #if __BSD_VISIBLE 337 int asprintf(char **, const char *, ...) __printflike(2, 3); 338 char *ctermid_r(char *); 339 void fcloseall(void); 340 char *fgetln(FILE *, size_t *); 341 __const char *fmtcheck(const char *, const char *) __format_arg(2); 342 int fpurge(FILE *); 343 void setbuffer(FILE *, char *, int); 344 int setlinebuf(FILE *); 345 int vasprintf(char **, const char *, __va_list) 346 __printflike(2, 0); 347 348 /* 349 * The system error table contains messages for the first sys_nerr 350 * positive errno values. Use strerror() or strerror_r() from <string.h> 351 * instead. 352 */ 353 extern __const int sys_nerr; 354 extern __const char *__const sys_errlist[]; 355 356 /* 357 * Stdio function-access interface. 358 */ 359 FILE *funopen(const void *, 360 int (*)(void *, char *, int), 361 int (*)(void *, const char *, int), 362 fpos_t (*)(void *, fpos_t, int), 363 int (*)(void *)); 364 #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) 365 #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) 366 367 /* 368 * Portability hacks. See <sys/types.h>. 369 */ 370 #ifndef _FTRUNCATE_DECLARED 371 #define _FTRUNCATE_DECLARED 372 int ftruncate(int, __off_t); 373 #endif 374 #ifndef _LSEEK_DECLARED 375 #define _LSEEK_DECLARED 376 __off_t lseek(int, __off_t, int); 377 #endif 378 #ifndef _MMAP_DECLARED 379 #define _MMAP_DECLARED 380 void *mmap(void *, size_t, int, int, int, __off_t); 381 #endif 382 #ifndef _TRUNCATE_DECLARED 383 #define _TRUNCATE_DECLARED 384 int truncate(const char *, __off_t); 385 #endif 386 #endif /* __BSD_VISIBLE */ 387 388 /* 389 * Functions internal to the implementation. 390 */ 391 int __srget(FILE *); 392 int __swbuf(int, FILE *); 393 394 /* 395 * The __sfoo macros are here so that we can 396 * define function versions in the C library. 397 */ 398 #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) 399 #if defined(__GNUC__) && defined(__STDC__) 400 static __inline int __sputc(int _c, FILE *_p) { 401 if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) 402 return (*_p->_p++ = _c); 403 else 404 return (__swbuf(_c, _p)); 405 } 406 #else 407 /* 408 * This has been tuned to generate reasonable code on the vax using pcc. 409 */ 410 #define __sputc(c, p) \ 411 (--(p)->_w < 0 ? \ 412 (p)->_w >= (p)->_lbfsize ? \ 413 (*(p)->_p = (c)), *(p)->_p != '\n' ? \ 414 (int)*(p)->_p++ : \ 415 __swbuf('\n', p) : \ 416 __swbuf((int)(c), p) : \ 417 (*(p)->_p = (c), (int)*(p)->_p++)) 418 #endif 419 420 #define __sfeof(p) (((p)->_flags & __SEOF) != 0) 421 #define __sferror(p) (((p)->_flags & __SERR) != 0) 422 #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) 423 #define __sfileno(p) ((p)->_file) 424 425 extern int __isthreaded; 426 427 #define feof(p) (!__isthreaded ? __sfeof(p) : (feof)(p)) 428 #define ferror(p) (!__isthreaded ? __sferror(p) : (ferror)(p)) 429 #define clearerr(p) (!__isthreaded ? __sclearerr(p) : (clearerr)(p)) 430 431 #if __POSIX_VISIBLE 432 #define fileno(p) (!__isthreaded ? __sfileno(p) : (fileno)(p)) 433 #endif 434 435 #define getc(fp) (!__isthreaded ? __sgetc(fp) : (getc)(fp)) 436 #define putc(x, fp) (!__isthreaded ? __sputc(x, fp) : (putc)(x, fp)) 437 438 #define getchar() getc(stdin) 439 #define putchar(x) putc(x, stdout) 440 441 #if __BSD_VISIBLE 442 /* 443 * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12 444 * B.8.2.7 for the rationale behind the *_unlocked() macros. 445 */ 446 #define feof_unlocked(p) __sfeof(p) 447 #define ferror_unlocked(p) __sferror(p) 448 #define clearerr_unlocked(p) __sclearerr(p) 449 #define fileno_unlocked(p) __sfileno(p) 450 #endif 451 #if __POSIX_VISIBLE >= 199506 452 #define getc_unlocked(fp) __sgetc(fp) 453 #define putc_unlocked(x, fp) __sputc(x, fp) 454 455 #define getchar_unlocked() getc_unlocked(stdin) 456 #define putchar_unlocked(x) putc_unlocked(x, stdout) 457 #endif 458 459 #if __BSD_VISIBLE 460 int renameat(int, const char *, int, const char *); 461 #endif 462 __END_DECLS 463 #endif /* !_STDIO_H_ */ 464